التفاصيل البيبلوغرافية
| العنوان: |
Sugarcane Nitrogen Assessment and Yield Response on Shallow Florida Histosols. |
| المؤلفون: |
McCray, J. Mabry, de Camargo Santos, Aline, Shangning Ji |
| المصدر: |
Journal of the American Society of Sugar Cane Technologists; 2022, Vol. 42, p61-66, 11p |
| مصطلحات موضوعية: |
HISTOSOLS, SUGARCANE, FERTILIZER application, SUGARCANE growing, SOIL depth |
| مستخلص: |
Nitrogen (N) fertilizer application is not recommended for sugarcane (Saccharum spp.) grown on Florida Histosols because an estimated 600 kg N ha-1 are mineralized in these soils each year. However, because these soils have been drained for the last century, some Histosols in the Everglades Agricultural Area (EAA) have become very shallow as the soils have subsided with organic matter oxidation. To examine the possible limitation of inadequate N for sugarcane on shallow Histosols, a study was conducted to (1) determine if sugarcane leaf N concentration relates to soil depth in commercial sugarcane fields, and (2) evaluate sugarcane yield response to N fertilizer application. Sample locations were established in thirty commercial sugarcane fields for each of three years (90 total fields) to assess leaf N concentration across a range of soil depths. Also, three small-plot trials were established on Histosols with soil depth < 35 cm, with N rates of 0, 56, 112, and 168 kg N ha-1. In the commercial field assessment, sugarcane leaf N concentration did not relate to soil depth across a depth range of 15 to 154 cm. Leaf N concentration decreased during the grand growth period but was rarely below the critical value of 18 g N kg-1. Sugarcane yield response to fertilizer N application was limited in the N rate trials. Therefore, there is not sufficient evidence to recommend N fertilizer applications for sugarcane grown on shallow Histosols. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |